Battery module and electric device

Abstract

The present application discloses a battery module and an electric device, the battery module including at least three cell rows parallel to each other, where any two adjacent cell rows are staggered. A busbar includes the following conductive mechanisms: a first connector, a second connector, and a plurality of first conductive bars and a plurality of second conductive bars located therebetween and arranged side-by-side in a first direction and alternating with each other; each conductive bar comprises at least three conductive units and a connector, and each conductive unit corresponds to one cell; in each conductive bar, two adjacent conductive units are connected to electrodes with opposite polarities, and two spaced conductive units are connected to electrodes with same polarity. Two electrodes of each cell are connected to any two adjacent conductive mechanisms in the busbar.

What is claimed is: 
     
         1 . A battery module comprising:
 a cell assembly having a positive output terminal and a negative output terminal, the cell assembly comprising at least three cell rows parallel to each other, each of the cell rows comprising a plurality of cells arranged along a first direction, any two adjacent ones of the at least three cell rows are staggered, and each of the cells comprising two electrodes of opposite polarities; and   a busbar electrically connected to the two electrodes of each of the cells of the at least three cell rows, the busbar comprising: a first connecting member, a second connecting member, and a plurality of first conductive bars and a plurality of second conductive bars disposed between the first connecting member and the second connecting member, the first connecting member being connected to the positive output terminal, the second connecting member being connected to the negative output terminal, the plurality of first conductive bars and the plurality of second conductive bars being arranged side-by-side along the first direction respectively, and the plurality of first conductive bars and the plurality of second conductive bars alternating with each other; wherein each of the first conductive bars and the second conductive bars comprises at least three conductive units disposed along a second direction and a connector connecting the at least three conductive units, each of the conductive units corresponds to one of the cells, and the second direction is perpendicular to the first direction; in the at least three conductive units of each of the first and second conductive bars, two adjacent ones of the conductive units correspond to two of the cells and connect two of the electrodes of the two cells which are of opposite polarities, and two spaced ones of the conductive units correspond to two of the cells and connect two electrodes of the two cells which are of the same polarity;   wherein, one of the electrodes of each cell is connected to a first conductive mechanism, and another electrode of the cell is connected to a second conductive mechanism, and the first conductive mechanism and the second conductive mechanism for the cell are any two adjacent ones of the first connecting member, the second connecting member, the plurality of first conductive bars, and the plurality of second conductive bars.   
     
     
         2 . The battery module according to  claim 1 , wherein the at least three cell rows comprise a first number of cell rows, the at least three conductive units comprise the first number of conductive units, the first number being an even number greater than  3 . 
     
     
         3 . The battery module according to  claim 1 , wherein in each of the first and second conductive bars, the connector comprises a plurality of sub-connectors, each of which is disposed between two adjacent ones of the conductive units; the sub-connectors each comprising two opposite connecting edges, each of the connecting edges having two ends connected to the two adjacent conductive units respectively, the two connecting edges being disposed to recess towards each other. 
     
     
         4 . The battery module according to  claim 3 , wherein each of the connecting edges has a curved shape. 
     
     
         5 . The battery module according to  claim 3 , wherein each of the sub-connectors is further provided with a fusing structure. 
     
     
         6 . The battery module according to  claim 1 , further comprising a support assembly, the support assembly being configured to hold the busbar, the support assembly comprising at least one support, the busbar being provided on the support; at least three adjacent ones of the cell rows forming a cell row group, at least one end of the cell row group in the first direction having a holding space, the support being at least partially disposed within the holding space. 
     
     
         7 . The battery module according to  claim 6 , wherein the cell row group comprises a first cell row, a second cell row, and a third cell row, the first cell row, the second cell row, and the third cell row having a first cell, a second cell, and a third cell, respectively, at the end of the cell row group in the first direction; the second cell being closer to an inner portion of the cell row group compared to the first cell and the third cell to form the holding space between the first cell, the second cell, and the third cell. 
     
     
         8 . The battery module according to  claim 7 , wherein the support comprises a connecting portion and a limiting portion disposed on at least one side of the connecting portion, the limiting portion being provided with a recess on a side close to the cell assembly, and wherein at least one of the first cell and the third cell is located in the recess. 
     
     
         9 . The battery module according to  claim 8 , wherein the limiting portion is located on both sides of the connecting portion, and the limiting portion is provided with two recesses on the side close to the cell assembly, and wherein the first cell and the third cell are located in the two recesses respectively. 
     
     
         10 . The battery module according to  claim 8 , further comprising an output terminal connector, wherein the output terminal connector is provided on the connecting portion, and wherein the output terminal connector is connected to a third connecting member, the third connecting member being one of the first connecting member and the second connecting member. 
     
     
         11 . The battery module according to  claim 10 , wherein the connecting portion is provided with a cavity on a side away from the cell assembly, the cavity being located in the holding space, and the output terminal connector being located in the cavity. 
     
     
         12 . The battery module according to  claim 11 , wherein the connecting portion is provided with an opening at a side close to the busbar in communication with the cavity, the output terminal connector is provided with a slot at a position facing towards the opening, the third connecting member comprises a terminal tab, the terminal tab is inserted into the slot through the opening and is electrically connected to the output terminal connector. 
     
     
         13 . The battery module according to  claim 12 , wherein the third connecting member further comprises a connector tab connected to the terminal tab, the connector tab being electrically connected to the positive output terminal; wherein,
 a material of the connector tab is aluminum; and/or   a material of the terminal tab is copper.   
     
     
         14 . The battery module according to  claim 13 , wherein the material of the connecting tab is AL1060-O state aluminum; and/or the material of the terminal tab is T2-Y2 copper. 
     
     
         15 . The battery module according to  claim 6 , wherein the cell row group has two holding space at two ends in the first direction, respectively; the at least three cell rows comprise at least four cell rows in which four adjacent cell rows have the two holding spaces in the first direction; the at least one support comprising two supports, the two supports being located at least partially within the two holding spaces, respectively. 
     
     
         16 . The battery module according to  claim 1 , further comprising an FPC located on one side of the busbar and electrically connected to the busbar, the FPC being configured to collect information about each of the cells. 
     
     
         17 . The battery module according to  claim 16 , further comprising a first insulating film and a second insulating film, the first insulating film being located on one side of the busbar away from the FPC, the second insulating film being located on one side of the FPC away from the busbar, wherein the first insulating film and the second insulating film are connected by heat pressing. 
     
     
         18 . The battery module according to  claim 16 , further comprising a thermistor located on the side of the FPC away from the busbar and electrically connected to the FPC, the thermistor being configured to collect temperature of the cells. 
     
     
         19 . The battery module according to  claim 18 , wherein the thermistor is an NTC thermistor. 
     
     
         20 . An electric device comprising the battery module according to  claim 1 .